We have a Pehlm-Sloane PS-1500 server in our medical office. The power supply is no longer working. We cannot nail down a replacement power supply. The original one was an EDAC EA-11603. Although they are still available, we are having problems finding out what the exact voltage reqirement is for our server and the size of the barrel connector that plugs into the server. These two things are necessary according to the supplier of the power supplies. Unfortunately the original supplier of the system is out of business, as is the maker of the computer and the power supply. We were never given any specs at the time of purchase. How do we get a new power supply that works and does not damage the unit?